Written by Jennifer Walsh. Reviewed for technical accuracy by Shubham Dixit, Independent Expert in Email Forensics and Data File Conversion. Updated 18 September 2026.
Shubham is an independent external reviewer and not an employee of PCDOTS.
Quick answer. When your Gmail storage fills up, new mail bounces back to senders and you can’t send either. Google’s 15 GB is shared across Gmail, Drive and Photos, so free space fast, delete big attachments, empty Trash and Spam and clear Drive or Photos. One catch, the emails that already bounced won’t come back on their own, so ask those senders to resend.
On this page
- Why is Gmail not receiving emails when storage is full?
- Will the missed emails come back after I free space?
- How do you free up Gmail space fast?
- You freed space but still not receiving? Here’s why
- How do you keep the emails but free the space?
- Should you just buy more storage?
- Which fix should you use?
- Frequently asked questions
Why is Gmail not receiving emails when storage is full?
Your Google account gets 15 GB free, and it’s shared across Gmail, Google Drive and Google Photos. When that pool fills, Gmail stops both sending and receiving.
New mail sent to you bounces back to the sender with a mailbox-full error, so it never reaches your inbox. You can’t send either, and Drive uploads and Photos backups stop too. That’s why a full account feels like everything froze at once.
The fix is to free space, and the catch about the mail you already missed is right below. Because the 15 GB is shared, the real space hog is Drive or Photos as much as the inbox.
Gmail, Drive and Photos share one 15 GB pool, and a full pool blocks mail in and out.
“The panic I hear is always the same, mail has stopped arriving. What’s happening is that a full account bounces every incoming message back to the sender, so nothing lands. The part people miss is that clearing space does not pull those bounced emails back, they’re already gone, and the sender has to send them again. So the move is to free space fast, because a bounce will retry for a day or two before it gives up, then message anyone important and ask them to resend. And nine times out of ten the thing eating the 15 GB isn’t email at all, it’s Drive files or Photos.” Shubham Dixit, Email Data reviewer (draft, pending approval)
Will the missed emails come back after I free space?
No, not on their own. This is the part that catches people out, so it’s worth being clear.
What happens to the bounced mail
- It bounced to the sender. Mail that arrived while you were full went back to whoever sent it, not into a queue.
- Freeing space doesn’t re-deliver it. Once you’re under the limit, new mail flows again within minutes, but the bounced ones don’t return.
- So free space fast, then ask senders to resend. A soft bounce keeps retrying for a day or two, so quick action can still save some. After that, the sender has to send it again.
How do you free up Gmail space fast?
You free up space by finding what’s using it, then deleting the big stuff and emptying the folders that still count. It’s free, and it takes a few minutes.
Here are the five steps.
- Open the Google storage page at one.google.com/storage to see if Gmail, Drive or Photos is the hog.
- In Gmail, search
has:attachment larger:10M, then select and delete the big emails. - Empty the Gmail Trash and Spam, since both still count against your storage.
- In Drive, sort by size and delete large files, then empty the Drive Trash.
- In Photos, remove large or backed-up items, then empty the Photos Trash.
When mine filled up I checked the storage page first, since the real hog is Drive or Photos as much as the inbox. The storage page also has a cleanup tool that gathers the large emails, spam and junk files in one list.
Check the storage page, delete big emails and empty Trash and Spam, and you’re back under the limit.
You freed space but still not receiving? Here’s why
You freed space but Gmail still says full, or mail still isn’t arriving. A handful of things cause that, and every one has a quick fix.
Common reasons
- Trash or Spam not emptied. Deleted mail sits in Trash for 30 days and still counts, so empty it.
- The counter is lagging. Storage can take a while to update. Sign out and back in, or refresh.
- Drive or Photos is the real hog. The inbox can be nearly empty while Drive or Photos fills the pool.
- You bought storage, but it hasn’t applied. An upgrade takes a moment. Sign out and in, then check the storage page.
- A forwarding or filter rule. Mail can be diverted, or the forwarding account is itself full.
Two related cases. If a message you sent bounces with “the recipient’s inbox is out of storage space”, it’s their account that’s full, not yours, so let them know. And if Drive looks empty but storage still reads full, the space is hiding in backups or hidden app data, so check Drive’s Manage apps and the Backups section.
To stop it coming back, switch Google Photos to Storage Saver, which shrinks the photos you already backed up, and clear old mail now and then. A word of warning too, an account left full and unused for about two years can have its content deleted under Google’s inactive-account policy, so don’t let it sit.
How do you keep the emails but free the space?
You keep the emails and still free the space by archiving old mail off Gmail, then deleting it from the account. You get a copy on your PC, and Gmail gets its space back.
You can do this with Google Takeout for a plain export, or a tool that saves the mail in a format you can open later. PCDOTS Email Backup signs in to Gmail and saves the mail to PST, PDF or MBOX on Windows, keeping the folders and attachments, so you can delete the old mail from Gmail after. It uses a Google sign-in or an app password, not the old less secure apps setting, which Google has removed. Follow these four steps.
- Install and run PCDOTS Email Backup, then Add your Gmail account.
- Preview the loaded mail, then select the old folders to archive.
- Open Export and select PST, PDF or MBOX, then a destination.
- Save the backup, then delete that mail from Gmail to free the space.
The archive route, save old mail off Gmail, then delete it to free space.
Here are the first steps with the screens.
Step 1. Add your Gmail account.
Step 2. Preview and select the folders.
Step 3. Open Export and select PST, PDF or MBOX.
Related reading, our guides to export Gmail to Thunderbird and import Google Takeout to a new account. To read a saved file, the free MBOX viewer opens it.
Should you just buy more storage?
You can buy more storage if you’d rather not delete anything. Google One adds space, at 100 GB, 200 GB or 2 TB, and it covers Gmail, Drive and Photos together.
Upgrading fixes the receiving problem the moment it applies, though it can take a few minutes to show. It’s the simple route if your data is worth keeping, but freeing space costs nothing, so many people clear first and upgrade only if they still run short.
The 15 GB is shared, so check all three, the hog is not always the inbox.
Which fix should you use?
Free space first, archive if you want to keep old mail and upgrade if you’d rather not delete.
| Fix | Best for | Good to know |
|---|---|---|
| Free up space | Getting mail flowing fast | Free, delete big items, empty Trash |
| Archive, then delete | Keeping old mail | Save to PST, PDF or MBOX first |
| Buy Google One | Not deleting anything | 100 GB and up, applies in minutes |
Key takeaways
- A full Gmail bounces incoming mail back to senders, and you can’t send either.
- The 15 GB is shared with Drive and Photos, so the real hog is not always the inbox.
- Bounced mail doesn’t come back on its own, so free space fast and ask senders to resend.
- Free space by deleting big emails and emptying Trash and Spam, or archive or buy more.
Frequently asked questions
If my Gmail storage is full, can I still receive emails?
No. A full account bounces incoming mail back to the sender, so it doesn’t reach you. Once you free space, new mail flows again, within minutes.
Will I get the missed emails back after I free space?
Not on their own. Mail that bounced while you were full went back to the sender. Free space fast, then ask those senders to resend anything important.
Why does Gmail say storage is full when my inbox is nearly empty?
The 15 GB is shared with Google Drive and Google Photos. Your inbox can be light while Drive or Photos fills the pool. Check the storage page for the breakdown.
I cleared space but it still says full. Why?
The Trash and Spam still count until emptied, and the counter can lag. Empty both, then sign out and back in so the storage page updates.
How do I free up the most space quickly?
Search has:attachment larger:10M in Gmail and delete the big ones, empty Trash and Spam, then clear large files in Drive and Photos.
Can I free space without losing my emails?
Yes. Archive old mail to a PST, PDF or MBOX file with a backup tool or Google Takeout, then delete it from Gmail. You keep a copy and reclaim the space.
So what’s really filling your 15 GB?
A full Gmail stops receiving because it bounces incoming mail back to senders, and the 15 GB is shared with Drive and Photos. Free space fast by deleting big emails and emptying Trash and Spam, and remember the bounced mail won’t return on its own, so ask those senders to resend. Archive old mail if you want to keep it, or buy more storage if you’d rather. So what’s really filling your 15 GB, the inbox, or Drive and Photos?
